Self-extinguishing flashlight
US5138538A · kind A · utility
105Cited by
6References
15Claims
0Family size
Inventor
Key dates
| Filing date | Mar 25, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Mar 25, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S362/802
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flashlight having a self-extingushing feature that prevents unintentional run-down of its batteries, particularly when used by children, which is achieved by means of a circuit breaking device controlled by a timer, and further having a bypass switch, preferably of a child-proof nature, to override the self-extinguishing feature and thereby improve the utility of such flashlight as an ordinary household flashlight. Optionally, the flalshlight may also have additional "child-proofing" mechanisms such as an interlock to prevent unintended activation of the bypass switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.